Java script error

Question

Code which is working

{!REQUIRESCRIPT("/soap/ajax/29.0/connection.js")}
{!REQUIRESCRIPT("/soap/ajax/29.0/apex.js")}
window.open('/apex/transferrequest?id={!Case.Id}');

Code which is not working

{!REQUIRESCRIPT("/soap/ajax/29.0/connection.js")}
{!REQUIRESCRIPT("/soap/ajax/29.0/apex.js")}
if({!Case.Status}  =  'Closed'){
    alert('Case is Closed cannot update.');
}
else{
    window.open('/apex/TransferRequest?id={!Case.Id}')
}

If statement is being validated alert is shown, but there is some issue with else. What could be the possible solution.

Answer 1

In any programming language:

1. = means Assignment
2. == means Comparison

Also JavaScript is Dynamically typed programming languages, so you have to be careful while comparison. Status should be in quotes!

So, try changing:

if({!Case.Status}  =  'Closed')

to:

if("{!Case.Status}" == "Closed")